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said that atoms are ideal geometric forms -
Believed atoms were uniformed. Central figure in the atomic theory. -
The Alchemists believed all metals were formed from 2 principals. These consist of mercury and sulfur. -
Neils Bohr created the Solar System Model -
Believed everything was made of tiny particles -
he explained that matter is conserved during chemical changes -
John Dalton created the Billiard Ball Model -
said that all matter is made of invisible atoms -
stated that all atoms are reletively the same size -
put elements in order (periodic table) -
JJ Thompson discovered the electron -
discovered polonium and radium -
Discovered that there were 2 types of radiations -
JJ Thompson created the Plum Pudding Model -
discovered the elementary charge of an electron through experiment. -
Said "some physical quantities only take discrete values" -
Discovered the Moseley law -xray- -
Mathematically proved atoms are real. He also proved liquids are made of molecules. -
Eruin Schordinger created the Electron Cloud Model -
James Chadwich discovered neutrons